Tax-filing season has started, which unfortunately means tax-scam season has started, as well. The IRS is already warning taxpayers to be on guard about a new refund scam, and just two days ago, a Manhattan grandma made the news by foiling an IRS phone scammer. All of which raises the question of how to identify an IRS scam in the first place. We've put together this infographic to help you separate tax fact from fiction.